This is where the harmonic balancer comes in. The circular device, made of rubber and metal, is bolted at the front end of the crankshaft to help absorb vibrations. It's usually connected to the crank pulley, which drives accessories like the air conditioner.
Additional costs: Ground water wells can also be tested for radon, then, if needed, can get a water radon mitigation system installed. Installing a water radon mitigation system runs from $1,000-$4,500, and maintenance runs $0 to $150 annually.
1 Ground water wells can also be tested for radon, then, if needed, can get a water radon mitigation system installed. 2  Installing a water radon mitigation system runs from $1,000-$4,500, and maintenance runs $0 to $150 annually. 3  To find out about radon content in a city water system, call the local water provider. Just sealing cracks and holes in the foundation can cost as little as $100, but this method alone has limited effectiveness. 2  Ventilating the home and crawlspace is a temporary and limited fix. 3  Passive and active suction systems cost $550-$2,500 depending on the size of the house.